Adjustable jack head



A. H. BOTTORFF 2,786,649

ADJUSTABLE JACK HEAD March 26, 1957 2 Sheets Sheet 1 Filed July 11, 1955UWD DD 0 [1 U 0 GT 38 D o D 'D E IO U D FIGURE 4.

5| 2 52 4] 45 I 4 6| HI!!! '5554 -43 5 59 3a 4 'l 57 51g 37 44 35 42 u 14'9 W1, J'l h. H 50 l 2 47 I I 52 5| FIGURE 5. 37 1 I I l 44 Nagy 44 Ai-' 45 1 INVENTOR ALBERT H. BOTTORFF. FIGURE 2. I ATTY.

March 26, 1957 BOTTORFF 2,786,649

ADJUSTABLE JACK HEAD Filed July 11, 1955 2 Sheets-Sheet 2 FIGURE ll.

INVENTOR ALBERT H. BOTTORFF ADJUSTABLE JACK HEAD Albert H. Bottorfi, St.Joseph, Mo.

Application July 11, 1955, Serial No. 521,250

1 Claim. (Cl. 254-1) This invention relates to an improvement in a jackbase and more particularly to the necessary economical structure forlifting loads or objects located very close to the floor or pavement.

An advantage of the present improved base is in the economical provisionof a jack having a pair of base plates spaced apart for the support ofthe jack post so that the lift means or plate can be convenientlylowered to the floor or pavement and inserted below an article to belifted, thus making a small lift with a pinch bar sufficient for theinsertion of the lift means or plate between the article and floor.

With this primary advantage the improved jack will be more fullyunderstood from the accompanying drawings, this specification and theclaim appended.

In the drawings:

Figure 1 is a perspective view of the improved jack illustrating thefront and left side thereof, the base plates and lift means or platebeing on the floor in the lowered position.

Figure 2 is an enlarged sectional fragmentary view taken on lines 22 ofFigure 5 and rotated clock-wise 90 degrees to illustrate the lowerportion of the perforated web of the jack post in an upright mannerbolted to the support plates.

Figure 3 is a perspective view illustrating the lift means or lift platein an inverted position, from that shown in Figure 1, with the integralupright member turned downward and the connection ribs projectedtherefrom.

Figure 4 is a perspective view of the improved jack illustrating theleft side and rear thereof, the lift member being in the invertedposition and the slidable head raised to an intermediate height on thejack post.

Figure 5 is a sectional view 'taken on lines 5-5 of Figure 1 and rotatedclock-wise a few degrees to illustrate a plan view of the pair of baseplates with support plates secured thereto and bolted to the section ofthe jack post, the sideplates and wheels are secured thereto.

Figure 6 is an enlarged side view of the slidable jack head mounted on afragment of the jack post, and part of the jack handle is broken away.

Figure 7 is a sectional view taken on lines 77 of Figure 6 illustratingonly the latch and a portion of the jack handle.

Figure 8 is a rear view of the slidable jack head with a portion of thejack post being broken away above and below the slidable jack head.

Figure 9 is a sectional view taken on lines 9-9 of Figure 8 with theclimbing pin withdrawn from the jack post web.

Figure 10 is a sectional view taken on lines 10-10 of Figure 8illustrating only the upper portion of the slida ble jack head withother parts being broken away.

Figure 11 is a sectional view taken on lines 11-11 of Figure 8 with theupper climbing pin withdrawn from the jack post perforated web.

Figure 12 is a perspective view of a lift member being nited StatesPatent 0 aligned by means of their longitudinal axes.

f I: feas Mar-v a-hook attached thereto to illustrate the use of otherkinds of lifting apparatus for various types of loads.

The slidable head 20 preferably comprises; the slida ble housing 21,slidable guide member 22, toggle links 23 having one end of each thereofpivotally connected to slidable guide member 22 at 24 and the oppositeend thereof'being pivotally connected to lever 25 at 26, the lever 25pivotally connected to slidable housing 21 on pin 70, engageableclimbing pin 27 slidably retained in housing 21, engageable climbing pin28 slidably retained in guide member 22, compression springs 29 and 30being around the engageable climbing pins 27 and 28 respectively andbeing confined between the bracket ends 31 and 32 respectively andactuator pins 33 and 34 respectively, reversing cam member 35, reversinglever 36, and the actuating parts for moving the lift member upwardly,downwardly, or support the lift member on the upright jack post 37 bythe engageable climbing pins 27 and 28. These parts are all old and areassociated with the invention to illustrate an operable jack slidablehead'l20.

Other types of operable jack heads may be used without departure fromthe improved invention.

The'upright jack post 37 is provided with the usual perforated web 38for the climbing pins 27 and 28. An upright handle 39 is attached to theupper portion of the upright jack post 37 with the bolt or rivet 40. Thehandle projects above the post 37 and both are preferably A person maygrasp this handle with one hand and lift it for changing locationsthereof and the handle is also convenient for pulling or pushing thejack on its wheels 52.

A pair of flat, horizontal and elongated base plates 41 are spacedparallel, the front ends 42 thereof being designated the toe and theopposite ends 43 being designated the heel. A pair of support plates 44are each bent flatwise into a U shape. Each support plate has the curvedportion of the U shape secured to the lower end of the jack postperforated Web 38 by bolt 45. The pair of U-shaped support plates 44 arebolted on opposite sides of the jack post perforated web 38. A pair ofside plates 46 are provided with one located along the outsidelongitudinal edge 47 of each base plate 41. The front lower edge 48 ofeach support plate 44 is located intermediate- 1y between the toe 42 andheel 43 of the respective base plate 41 and the rear lower edge 49 ofthe support plate is located along or near the heel 43. The supportplates 44 have their outer ends secured to the side plates 46 and thelower edges secured to the base plates 41. The lower edges of the sideplates 46 are secured to the respective base plates along the outeredges thereof with the front edge of each located intermediately betweenthe toe and the front of the U-shaped support plates. The side plates 46continue rearwardly at 5th past the support plates 44 and each isprovided with a stub axle or bolt 51 projected outward sidewise ortransversely to support a wheel 52. The plates are all secured togetheror attached preferably by welding or may be cast together withoutdcparture from the invention.

The stub axles or bolts 51 are located above the bottom of the baseplates 41 a greater distance than the outside radius of the wheels 52 sothat the jack may rest on the base plates 41 when in an upright positionand being used to raise or lower objects.

An upright channel 53 having a web 54 spacing its flanges 55 is securedto the slidable jack head 20. The web 54 is secured by casting orwelding to the front of the jack head 20 and the flanges 55 areprojected forward. The top of the web 54 has flanges 55 secured to theupper portion of the slidable jack head 20 and the channel 53 extendsdownward below the bottom of the slidable jack head 2!) a sufiicientdistance to touch the floor or pavement on which the base plates restwhen the plate 57' for a modified form of lift means.

slidable jack head 20 is lowered on the jackpost and positioned abovethe support plates 44.

The flanges 55 of the channel 53 are provided with .holes,=openin g .-orpreferably slots 56 aligned in horizontal pairs andspaeed verticallyforquiclcmajor adjustment without using thejackihandle.

The lift means or plate '57 is lflat, horizontal .andhas an uprightmember 58 secured thereto and provided with projected upright ribs'59preferably arranged to enter beends of :the-ribs to receive the bolt 61in the upper holes --60 of the ribs-.59 whether the .lift means isupright or inverted. The bolt 61 issufliciently long enough to enter theslots 56 and support the lift member either in an upright or an invertedposition. .'A space slug 'Il is secured to the lower portionof channel53.

Figure 12 illustrates a modified form of the lift :means. The lift meansplate 57' is preferablyflat,horizontal and has an upright member 53'secured thereto and is provided withuprightribs or flanges 59'preferably arranged to enter between the flanges S5. .Holes60 arealigned horizontally in the flanges or ribs 59' and are spaced near theends of the flanges or ribs to receive the bolt 61 in the upper holes60. A hook 62 is secured to the A gusset plate 63 is secured to plate57' and uprightmember 58'.

It is obvious that the lift member may be quickly ,changed in elevationby means of the bolt 61 and slots '56 in the channel flanges 55 tofacilitate a quick adjustment. The jack may be tilted on the heelthereof to be supported on the wheels 52 for moving about the floor orpavement.

What I claim as new and desire to secure by Letters Patent, is:

A jack; having an upright jack post provided with a perforated Web and aslidable head equipped with operab le climbing pins engageable with theperforated web and operable with a hand lever; comprising: a pair ofbase plates, said base plates being flat horizontal and elongated, oneend of said pair of base plates being designated the toe and theopposite end ofsaid pair of base plates being designated the heel,saidpair of base plates being spaced parallel, a pair'of support plates,each support plate being secured to the ,perforated web of the jack postclose to the bottom thereof with the ends of the support plates beingextended outward on opposite sides of the jack post, the lower edge ofeach support plate being secured to a respective base plate, the backportion of each support plate being located transversely on the heel ofthe respective base plate, a'pair of side plates, the ends of saidsupport'plates being secured to the side plates, said side plates beinglocated on opposite edges of the base plates extended across the ends ofthe support plates, said sidejplates being extended forward to anintermediate position between thefront toes and the front of the supportplates, and each of said side plates having the lower edge thereofsecured to the outside edge of the respective base plate.

References Cited'in the file of this patent UNITED STATES PATENTS1,038,520 Beck Sept. 17, 1912 1,410,380 Daniels Mar. 21, 1922 1,795,391Hansen Mar. 10, 1931 2,669,424 Branick Feb. 16, 1954 in W l

